Rolls-Royce, Airbus and Siemens Team Up on Hybrid Airliner

As many of your editor’s friends know, he is often lured to trolling the tabloids, looking for juicy bits about the royal family or Hollywood royalty. Recently, while perusing the Daily Mail* for news of the upcoming Harry/Meaghan nuptials, he came across the big-headline news that three European power players – Rolls-Royce, Airbus, and Siemens, are collaborating on creating a testbed for a hybrid power system.

The artist rendering provided by Airbus on Tuesday, Nov. 28, 2017 shows an Airbus e-FanX hybrid test plane. The aircraft will be flying with one electric turbofan motor and 3 conventional engines. The electric power for the electric engine is produced by a turbine within the plane that serves as a generator. (Airbus via AP)

The trio will take a Bae 146 four-engine regional jet, convert it to a hybrid demonstrator by 2020, and have a production plane in place by 2030. The high-wing airplane has four turbofans in place now, but the partners will replace one with a Siemens two-megawatt electric motor powered by a Rolls-Royce two-megawatt generator in the plane’s cargo hold.

The UK paper reports, ”The companies said they were looking ahead to the European Union’s long-term goals of reducing CO2 emissions from aviation by 60 percent, as well as meeting noise and pollution limits that they said ‘cannot be achieved with technologies existing today.’

Left to right: Frank Anton, Head of Siemens eAircraft; Mark Cousin, Airbus Head of Demonstrators, and Paul Stein, Chief Technology Officer for Rolls-Royce, consolidate their partnership with a handshake: Photo courtesy Airbus

Other sources more normally associated with aviation news take a slightly more cautious view of the development. MRO-Network.com, devoted to the maintenance, replacement, overhaul side of airline operation, backsteps: “Nonetheless, it is extremely unlikely that any standard commercial flight will use electric engines within the next few decades – at least until a quantum leap in battery technology delivers vastly superior power-to-weight ratios from the best current technology.

“Paul Eremenko, Airbus’ sometimes controversial head of technology, says the demonstrator ‘will pave the way to a hybrid single-aisle commercial aircraft that is safe, efficient, and cost-effective’”.

Efan-X diagram highlights layout of components, corporate responsibility for each

ATWonline.com (Air Transport World) explains, “The new powerplant follows a series of smaller demonstrators in recent years and the partners hope to fly it on a BAe 146 testbed, replacing one of the aircraft’s Avco Lycoming ALF 502 turbofans. A second engine may be replaced with another of the new electric motors once tests have provided sufficient confidence to do so.” Although the not-to-scale drawing of the component layout doesn’t allow assessing how much space the two-megawatt system will require, one can foresee “real estate” issues in aircraft with four, or in one prediction, even eight hybrid electric units powering things.

ATW reports, “Rolls-Royce’s chief technology officer, Paul Stein, described the new class of motors as being an integral part of the ‘third generation of aviation.’

“Head of Siemens eAircraft, Frank Anton, added: ‘This large flying demonstrator will be a major step for eAircraft toward a hybrid-electric future.

“’Thanks to our existing drive systems for drones and ultralight and light sport aircraft, we are already involved in aviation. Recently, we also presented a prototype motor for the CityAirbus, a flying taxi for use in urban areas.”’

AS ATW notes, “The three organizations are seeking to increase the pace of hybrid-electric development by maturing the technologies, safety and reliability involved.” Aviation will be cleaner and quieter in the future, thanks to efforts such as this, Zunum’s and Jeff Engler’s Wright Electric.

*That such publications are reporting on this is evidence that electric aviation is making its presence known.